* 
532 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
are never used again, and as no new crinoid species were de- 
scribed under them, it is not considered necessary to do more 
than call attention to them here. 
+Ophiocrinus hyselyi. 
Ophiocrinus indivisus Semper, 1868. 
1868. Semper, Wiegmann’s Archiv fiir Naturgesch., 1868, I. 
p. 68. 
T ype-locality—Pandanon, near Bohol, Philippines; 30 fathoms. 
Prof. Carl Semper. 
indivisus=undivided (in reference to the arms). 
+Pentacrinites BLUMENBACH, 1804. 
1804. Brumensacn, Abbildungen naturhistoricher Gegenstinde, 
Gottingen, 1804, Hefte 7, p. 70. 
Type.—Pentacrinites fossilis Blumenbach (n. sp.) =Pentacrinites 
brittanicus von Schlotheim, 1820=Pentacrinites (Penta- 
crinus) briareus Miller, 1821 [=? Enerinus coralloides 
Andreae, 1763]. 
Pentacrinites, a common name for Pentacrinoid remains. 
Although as early as 1864 Sir Wyville Thomson writes that 
Pentacrinites briareus seems to have a valid claim as the type of 
“ Pentacrinus,” this was ignored by P. H. Carpenter, who ac- 
cepted /sts asteria Linneeus as the type and always dated the 
genus from Miller, 1821, although he must have known it had 
been in more or less common use since the time of Agricola. 
Hatracrinus Austin and Austin, 1845, has the same type as Pen- 
tacrinites Blumenbach, and is therefore a pure synonym of it. 
Pentacrinites is not congeneric with any recent crinoid, and 
therefore must be dropped so far as recent forms are concerned. 
Isocrinus I. Agassiz, 1836, 1s equivalent to “ Pentacrinus” as 
used by P. H. Carpenter and most other authors, and must there- 
fore be adopted for the recent species. 
Mr. F. A. Bather, in his admirable essay on “ Pentacrinus, a 
name and its history ” (Natural Science, XII, April, 1898, p. 245), 
first made this point clear; but 1t seems necessary to call attention 
to it again, as a few writers still continue to use “ Pentacrinus 
Miller, 1821,” in spite of the facts as stated by him. 
Pentacrinites Blumenbach, 1804, appears to be a synonym of 
Encrinus Andreae, 1763, with the same species as type, but I 
have been unable to consult the plate on which the type species 
of the latter is figured. 
Pentacrinus alternicirra P. H. Carpenter, 1882. 
1882. P. H. Carpenrer, Bull. Mus. Comp. Zool., X, No. 4, p. 
167; detailed description in Challenger Reports, XI, Zoology, 
p. 821 (1884). . oes 
